'Nightline' Daily Line, Dec. 12: Oregon Mall Shooter Identified

2:54 p.m. ET: ABC's Bob Woodruff sat down with actress Naomi Watts to talk about how she prepared for her role in "The Impossible." In the movie, Watts plays, Maria Bolen, a real-life victim of the 2004 Indian Ocean tsunami.

1:38 p.m.ET: BREAKING: Clackamas Sheriff presser: The masked gunman who killed two people in the crowded Clackamas Town Center mall in suburban Portland, Ore., was identified today as Jacob Tyler Roberts.

Today is 12-12-12, the last major numerical date using the Gregorian or Christian calendar for almost another century. The next time three numbers will align as they did on 9-9-09, 10-10-10 and 11-11-11 will be on Jan. 1, 3001, or 1-1-1.

Many people who consider the number 12 lucky are rushing to get married, and even scheduling c-sections to have their babies delivered today.

11:13 a.m. ET: JUST ANNOUNCED: Actress Maggie was nominated for a SAG award today for her role as the family martriach in "Downton Abbey." Last night, "Nightline" went behind the scenes with the cast of the British sensation for a rare look at the upcoming Season 3. Watch what happens HERE:

10:01 a.m. ET: UPDATE: The masked gunman who killed two people in the crowded Clackamas Town Center mall in suburban Portland, Ore., before killing himself, was trying to "kill as many people as possible," police said today.